Lined feed collet



May 6, 1924. 1,492,792

J. M- GORDON ET AL LINED FEED COLLET Filed Oct. 5 3.92]

v wveutoz L ose ln h Gorclo n w 2 7714mm JOSEPH E. GORDON AND ROBERT '1.MILLER, 01 CLEVELAND, OHIO, ASSIG-NOES 1'0 m NATIONAL ACME COMPANY, ACORPORATION OF OHIO.

LINED FEED COLLE'L.

To all whom it come M:

Be it lmown that we, Josnrn M. Gonnon and ROBERT T. R, citizens of theUnited States, residing at Cleveland, in the county of Cuyahoga andState of Ohio, have invented certain new and useful Improvements inLined Feed Collets, of which the following is a specification.

This invention relates to improvements in feed colletsdesignedparticularly for attachment to the end of a stock bar feed tube of amachine, such as a metal worki machine, the object thereof bein toprovlde an improved feed collet and a soto provide a feed collet havingmeans for preventin the collet from scratching or otherwise amaging thestock or work when it is intermittently fed through the feed tube andthe collet.

In carrying out this object, it is also the purpose of this invention toprovide at the same time a feed collet which will be both lighter andcheaper in construction and at the same time highly efficient,serviceable and durable in use.

Heretofore in practice, when the stock or. work, such as soft brasswire, was fed back and forth through the feed collet, the metallic'pping surfaces thereof scratched or marre the surfaces of the wire,which has been found objectionable and disadvantageous, and it is theobject therefore, of this invention, to do away with these disadvantagesand rovide a feed collet which will grip and sad wire or stock formedfrom relatively soft metal or even hard metal without scratching orinjuring the surfaces of the same. In pursuance thereof the feed colletis provided with a lining, preferably of hard wood, fibre or othersuitable material, the lining having substantially the same constructionand shape as the collet and suitabl secured to the same whereby inoperation t e stock will. be fedthrough the feed collet without anyinjury to the same.

Other objects of this invention will appear in the following descriptionthereof, reference being had to the acocmpanying drawin formm a part ofthis specification, w erein e reference characters indicatecorresplondin parts in the several views, and w erein i 1 is aperspective view illustrating an em odiment of our invention; Fi 2 is aside view of the same and partly roken away; Fig. 3 is a front end viewthereof; Fig. 4 is a rear end view thereof; Fig. 5 is a side view insection of the construction illustrated .in Fig. 1; and Fig. 6 is aperspective view partly broken away of the ining or core member.

Our invention 1s of course not limited in the adaptation thereof to anyparticular form or style of feed collet, nor to a feed collet formed orconstructed in accordance with any preferred method or procem ofmanufacture, and in the drawing we have illustrated, by way of exampleonly, one form of feed collet, which comprises a tubular metallic body10 having slots 12 forming forwardl projecting resilient grippingfingers 11. earwardly of the body portlon 10 the collet is rovided witha reduced or shoulder formed portion 13 which, as illustrated, isthreaded in order to permit attachment of the feed collet to the feedtube of the machine. In the resent instance, the feed collet is shownwit a pair of gripping fingers, although it is to be understood that anydesired number may be provided. These fingers 11 terminate at theirforward ends in the usual grippin rtions 14. The outer metallic member 0t e feed collet is provided with a lengthwise extendingbore'therethrough, and within this bore is inserted a suitable lining or coremember 15, which is preferably shaped substantially in accordance'withthe shape of the body member of the collet, and which is adapted tocover the major portion of the inner surface of the same. The lining orcore 15 is provided with a shoulder formed portion 16 ada ted to lie injuxtaposition to the inner sur aces of the body member and the forwardportion of this lining is slotted as at 25 to cm resilient grippinfingers 26 corresponding to the ripping ngers 11 of the outer member. egripping portions 17 of the linin or core member are shaped so as to conorm substantially to the shape of the gripping parts 14of the fingers11, and the core is also provided with a lengthwise extending bore ofany preferred diameter in order to permit the stock or work 22 to be fedtherethrough. The inner surfaces 20 of the gripping portions 17 areshown in the present mstance as substantiall cylindrical in confiration, but it is 0 'course' obvious that t e same in practice willbeshaped in accordance with the shape of the work to be gripped andintermittently 'fed therethrough.

As illustrated in the drawing, the lining or core 15 may preferablyterminate somewhat short of the rear end of the collet and the same isprovided with tapered surfaces 21 in order to facilitate the. entranceof the work into the collet. The lining or core member may be secured tothe outer metallic member in any preferred manner, and in the presentinstance the parts are secured to gether by means of set screws 27,which project through the body portion 10 a suitable distance into thecore or lining.

It will be seen therefore, that we have provided an improved feed colletcomprising an outer member formed from steel or other metal and an innermember adapted to cover the surfaces thereof and formed of any suitablesoft or softer material, the result of this construction being to permitthe work to be gripped by the collet and fed therethrough without anyinjury or damage to the surfaces thereof. Furthermore, we have provideda feed collet wherein the amount of metal used is considerably reduced,thereby reducing the cost of the article and at the same time resultingin the provision of a feed collet which is considerably lighter inconstruction, and at the same time equally as durable and serviceable ascollets heretofore constructed entire- 1y of metal.

From the foregoing it will be seen that we have provided an improvedcollet comprising an inner member and an outer member each comprising abody portion and a resilient gripping portion, one member thereforsubstantially corresponding in shape to that of the other, the resultbeing that the resilient action of one member is reinforced by that ofthe other and when the inner member is formed of some suitable softmaterial, it not only prevents the marring of the work but it assists inpolishing the work as it passes therethrough and can be used on eithersteel or brass rods or thread rods without marring the threads andeffectually grips the work since even when made of wood the resilientfingers of the inner member spring with the fingers of the outer member.

We claim as our invention:

1. A feed collet comprising a tubular innor member and a tubular outermember, each substantially conforming in shape one to the other andsecured together and each comprising a body portion having longitudinally projecting resilient portions, the resilient portions of theinner member being in position to grip the work.

2. A feed collet comprising a metal outer member and an inner member ofrelatively soft material, each of said members comprising a body portionhaving a slotted tion forming a plurality of resilient fingers,

said inner member being held in fixed position in the body member.

4. A feed collet comprising a metal outer member and an inner member ofrelatively soft material, ear-h of said members comprising a bodyportion having a slotted portion forming a plurality of resilientfingers, said inner member substantialiy conforming in shape to the bodyand slotted portions of the outer member.

A feed collet comprising a metal outer member and an inner member ofwood, each of said members comprising a body portion having a slottedportion forming a plurality of resilient fingers, said inner membersubstantially conforming in shape to the body and slotted portions ofthe outer member and secured to said outer member.

6. A feed collet comprising a hollow member having a resilient portionand a onepiece tubular lining member formed of relatively soft materialsecured in said bod member and having a corresponding resi ient portionfor gripping the work.

7. A feed collet formed from a pair of members one secured within theother, and each comprising a tubular formed member comprising a bodyportion having resilient longitudinally projecting portions.

8. A feed collet comprising an outer metal member and an inner woodmember secured together against independent movement, each thereofhaving resilient projecting fingers.

9. As an article of manufacture a feed collet comprising a body portionhaving a plurality of resilient grippin members having a boretherethrough, and an expansible and contractible lining conforming inshape to said body and gripping members and held in fixed positionwithin said bore.

10. As an article of manufacture, a feed collet formed from a pair ofdissimilar members having a bore therethrough, one of said memberscomprising a tubular core having a plurality of resilient fingers ofrelatively soft material terminating in gripping surfaces shaped toconform to the work to be fed.

11. As an article of manufacture, a feed collet comprising a metal bodymember, and a core member of relatively soft material secured thereto,one of said members having means for positioning the collet on to theend of a feed tube and both of said members having a plurality ofcorrespondingly formed projecting resilient gripping fingers. I

1 2.As an article of manufacture a feed the core. member having etapered end at collet comprising a metal body member, and the borethereof.

a core member of relatively soft material Signed at Cleveland, county ofCuyahoga,

secured thereto one of said members having State of Ohio, this 22nd dayof September,

5 means for posltionin the collet on to the 1921.

end of a feed tube an both of said members having a plurality ofcorrespondingly formed projecting resilient gripping fingers,

